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The primary driver was the potential for server consolidation: virtualization allowed a single server to cost-efficiently consolidate compute power on multiple underutilized dedicated servers. The most visible hallmark of a return to the roots of computing is cloud computing , which is a synonym for data center based computing (or mainframe ...
A virtualized network function, or VNF, is implemented within one or more virtual machines or containers running different software and processes, on top of commercial off the shelf (COTS) high-volume servers, switches and storage devices, or even cloud computing infrastructure, instead of having custom hardware appliances for each network ...
Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external virtualization , combining many networks or parts of networks into a virtual unit, or internal virtualization , providing network-like functionality to software containers on a single ...
Within a server virtualization environment, applications are interconnected by what is referred to as a virtual switch, which is very different from high-performing hardware-based network switches offered by the likes of Juniper Networks and Cisco Systems. Virtual switches are software-based switches and rely on the movement of packets up and ...
Server I/O is a critical component to successful and effective server deployments, particularly with virtualized servers. To accommodate multiple applications, virtualized servers demand more network bandwidth and connections to more networks and storage. According to a survey, 75% of virtualized servers require 7 or more I/O connections per ...
virtualizing IP and Fibre Channel storage networking; allowing for single console management. Data centers around the world are reaching limits in power, cooling and space. [10] At the same time, capital constraints are requiring organizations to rethink data center strategy. Converged infrastructure offers a solution to these challenges.
The creation and management of virtual machines has also been called "platform virtualization", or "server virtualization", more recently. [2] [3] Platform virtualization is performed on a given hardware platform by host software (a control program), which creates a simulated computer environment, a virtual machine (VM), for its guest software ...
The virtualization device in turn performs I/O to the storage device. Caching of data, statistics about data usage, replications services, data migration and thin provisioning are all easily implemented in an in-band device. Out-of-band, also known as asymmetric, virtualization devices are sometimes called meta-data servers. These devices only ...